'Canine couriers' carried messages from one post to another during World War I.
This majestic-looking pug was given his own tiny pair of glasses and binoculars.
Dogs were also trained to locate wounded soldiers on the battlefield.
Supplied with their own gas masks, they could bring supplies or rations to wounded soldiers.
Dogs are part of the team — they don't get left behind.
They do get their own pair of 'doggles.'
Dogs and their handlers are hoisted onto helicopters as a pair.
Military dogs wear glasses and goggles to help protect their eyes.
Military dogs are proficient at detecting bombs, weapons and drugs and are also used in counter-terrorism missions.
